(a) Yes, you can get an extension. (b) No, you can not get an extension.
Many countries allow extensions to tax deadlines. But many do not. This question opens up a more “interesting” question to a tax specialist like me. Why have a deadline if you can have an extension? The answer is not something many people think about or even consider as a deadline is such a focusing event. I can offer an answer from a Canadian perspective.
The deadline is to motivate payment and also to allow governments to budget tax revenues per periods. The extension is a means of earning extra government revenue and also of ensuring accurate date is collected. Let me break each statement down.
With a deadline the tax is more likely to arrive at the government coffer and be available to fund government in a certain time frame. With an extension usual comes a fee or penalty or interest, which increases revenue and also with an extension data tends to get submitted once with higher accuracy rather then twice (original and then amendments). Remember that tax data serves more than one purpose. As well as measuring government revenue it is an important statistical data source for running government.